The Matich name was applied to a series of sports racing cars and open wheel racing cars produced in Australia between 1967 and 1974 under the direction of Sydney-based racing driver and engineer Frank Matich. SR3 The Matich SR3 was a Group A Sports Car built for Matich by Bob Britton in 1967. It was powered by an Oldsmobile V8 engine and was driven to victory by Matich in the 1967 Australian Tourist Trophy, Australia's premier sports car race of that year. Later in the year, Matich raced in both the US Can-Am series and in Australia, with two SR3s fitted with 4.4-litre Repco V8 engines. Matich won the 1968 Australian Tourist Trophy with a Repco powered SR3. SR4 A completely new design, the Matich SR4, was produced with designer-frabricator Henry Nehrybecki for 1969 utilising a quad cam Repco 740 V8. Matich dominated the inaugural Australian Sports Car Championship in that year, winning all three heats with the SR4. SR4B / SR5 The SR4B was a sports racing car of circa 1969 which was powered by a Lotus Twin Cam engine. In 1970 it was revised, renamed as the Matich SR5 and fitted with a Waggott 2.0-litre powerplant. A50 / A51 / A52 / A53 A50 Following the adoption of Formula 5000 regulations into Australian Formula 1 in 1971, Matich and Nehrybecki produced the Matich A50, the first single seater to wear the Matich name. The A50 was designed as a replacement for Frank Matich's successful McLaren M10B (Frank Matich had taken over development from McLaren of the M10B for F5000 racing in 1970 and dubbed it the M10C). Designed on a modular basis with separate front suspension, cockpit and rear end, the car was powered by a 5.0 L Repco Holden V8 engine. Matich drove an A50 to victory in the car's first race, the 1971 Australian Grand Prix at Warwick Farm after qualifying on pole position. Just three months after his 1971 AGP success, Matich qualified the A50 on pole for the 1972 Australian Grand Prix at Sandown and led early before retiring with scavenge pump failure on lap 5. Frank Matich then went on to win the 1972 Australian Drivers' Championship at the wheel of his A50. A total of four A50s were built during this period. Power output of the Repco-Holden engine around this time was approximately A51 2 new Matich A51s chassis 005 and 006